Air-box of brick-kilns.



J. C. BOSS.

AIR BOX 0F BRICK KILNS.

APPLICATION FILED MAY 6, 1912.

Patented May 4, 1915.

THE NORRIS PETERS CO4, PHOTU-LITHQ, WASHINGmN, D. c.

NT om n.

JOHN C. BOSS, OF ELKHART, INDIANA.

AIR-BOX F BRIGK-KILNS.

- To all whom, it may concern:

Be it known that I, JOHN C. Boss, citizen of the United States, residing at Elkhart, Indiana, have invented certain new and useful Improvements in Air-Boxes of Brick- Kilns, of which the following is a specification.

My invention, hereinafter described, relates to the air supplying and distributing boxes of brick kilns, of the class shown in Letters Patent of the United States, granted to me, on the 14th day of May 1901 No. 673896, and that of October 28, 1902, No. 712035. In these patents the air boxes are located in the bottom of the fire chamber, and are so arranged that the fuel lies over and about them, and the air forced into the said boxes is distributed upward into the mass of coal, whereby combustion is evenly and effectively maintained. I have, however, found these boxes less eflective when the cheaper and more refractory fuels are used, such as hard coal screenings, hard coal culm or the cheaper grades of lignite. As these fuels are more available in some localities and cheaper, I have devised a form of air distributing box, adapted more effectively to consume such fuels. This is a modification of the form shown in the aforesaid patents, though the location thereof, and the general construction and'arrangement are the same.

My said invention is illustrated in the accompanying drawings, in which Figure 1 is a transverse section of an arch showing my improved air-box as applied thereunder; Fig. 2 is a longitudinal section of the box partly broken away. Fig. 3 is a plan view of the same with the top plate removed, and Fig. 4 is a sectional view showing a -modified form of fastening means for the top plate.

In these drawings I have shown a single combustion chamber, such as that shown in my prior patents, and used by me, in which the air box is located preferably in the axial line of the chamber, and in the bottom as indicated at A. It will be understood that the fuel is placed over and on each side of the box, in said patents and the orifices, through which the air is discharged, are arranged in the top of the box, and direct the currents of combustion supporting the Specification of Letters Patent.

air upward, through the top of the air box, into the fuel above it. But I have found that in the kinds of fuel, above mentioned, this series of direct upward currents works ,less effectively, and by further experiment from, so as to permit the air, forced upward through the orifices in the top of the box, to impinge forcibly against the under surface of said plate, and to be thereby directed outward through the narrow space 3, between the top of the box and the under surface of the plate. These narrow horizontal blasts of air strike laterally into the coal, with force, and then rise, through the incumbent body with such effect that I am able, with this apparatus, to burn, as efiectively, the cheaper coals, as with my prior boxes, I burned the better and more expensive coals. It will be understood that one of these boxes is thus located in each fire chamber of the kiln and is supplied with air under pressure, from a proper source, through a branch pipe 4.

The orifices in the top of the boxes are shown at 5. They are transverse slots, the

walls of which flare upward, and spread the streams of air, which impinge upon the plate In order to hold the plate in proper relation to the top of the box, and removable, I form by casting or otherwise, on the under side of the plate, inclined or curved lugs 7, which engage removably with inclined or curved holes 8, in the top of the box. These are located to hold steadily and symmetrically, the cover on the box. Knobs or ribs 9 also formed on the under side of the plate, regulate the distance between the plate and box top, and find a bearing in the hollows 10. Instead of the curved lug, I may use a bolt, as shown at 11, Fig, 4, the bolt being preferably cast with its head embedded in the top plate, on the under side, in proper relation to the hole in the top of the box. The bolt passes through this top and is held by a nut 12. The lug and corresponding hole are, however, more convenient.

, Patented May a, 1915.

Application f led May 6, 1912. Serial No. 695,435. i i

I claim as my invention charging air laterally into said fuel at the 10 The combination with a brick kiln arch point where it contacts With said floor. and its iniperforate floor or hearth for sup- 'In testimony whereof, I afiix my signature porting fuel, of an air box embedded in said in presence of two Witnesses. floor and having its top open for the dis- 7 N 0. Boss charge of air and flush With the surface of the floor and a plate covering said top and WVitnesses: I overlapping said Walls of the box and spaced CARRIE M. BEOKNER, therefrom to form a narrow air exit for dis- ETHEL G. ABBEY.

Copies of this patent may be obtained for live cents each, by addressing the Commissioner of Paten s. Washington, I). 0. 

